Spigot bearing (bush) and input shaft length
Posted: Mon Aug 14, 2017 6:58 pm
I have a Porsche 924 that has had an RV8 3.5 (SD vitesse I think) conversion done. As a result of a clutch issue I have the entire drive line out of the car. I have decided to replace the torque tube (drive shaft) and gearbox with those from a Porsche 944 because the shafts in the 924 are a) only rated to 200ft-lbs b) can only use a 924 friction plate which is too small (not enough friction surface).
By upgrading to the 944 torque tube shaft, which is 1" with 23 splines, I can use an RV8 9 1/2" friction plate (the flywheel and coverplate are both RV8), and the shaft has a much higher torque rating than the 924's.
I was doing some further checks today to ensure fittment will be ok and realised that at the clutch end of the torque tube shaft (lets call it the input shaft) on the 944 shaft is ~10mm shorter than the 924's. The part of the shaft that is actually shorter is the reduced diameter section that slides into the Spigot bearing. Having made further checks and measurements I believe that the 944 input shaft will be long enough to slide into the spigot bearing but by only 10-11mm, were as the 924 went fully in to about 22mm (approx the length of the spigot bearing).
Do you think that the reduce length of shaft entering the spigot bearing will cause any issues? It should still locate the end of the shaft correctly.
By upgrading to the 944 torque tube shaft, which is 1" with 23 splines, I can use an RV8 9 1/2" friction plate (the flywheel and coverplate are both RV8), and the shaft has a much higher torque rating than the 924's.
I was doing some further checks today to ensure fittment will be ok and realised that at the clutch end of the torque tube shaft (lets call it the input shaft) on the 944 shaft is ~10mm shorter than the 924's. The part of the shaft that is actually shorter is the reduced diameter section that slides into the Spigot bearing. Having made further checks and measurements I believe that the 944 input shaft will be long enough to slide into the spigot bearing but by only 10-11mm, were as the 924 went fully in to about 22mm (approx the length of the spigot bearing).
Do you think that the reduce length of shaft entering the spigot bearing will cause any issues? It should still locate the end of the shaft correctly.